Mojo: Make some attempts towards fixing remote message pipe closure.

mojo/system/message_pipe_endpoint.cc

 // Copyright 2013 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #include "mojo/system/message_pipe_endpoint.h"
 
 #include "base/logging.h"
 #include "mojo/system/channel.h"
 
 namespace mojo {
 namespace system {
 
+void MessagePipeEndpoint::Close() {
+  NOTREACHED();
+}
+
 void MessagePipeEndpoint::CancelAllWaiters() {
   NOTREACHED();
 }
 
 MojoResult MessagePipeEndpoint::ReadMessage(
     void* /*bytes*/, uint32_t* /*num_bytes*/,
     std::vector<scoped_refptr<Dispatcher> >* /*dispatchers*/,
     uint32_t* /*num_dispatchers*/,
     MojoReadMessageFlags /*flags*/) {
   NOTREACHED();
   return MOJO_RESULT_INTERNAL;
 }
 
 MojoResult MessagePipeEndpoint::AddWaiter(Waiter* /*waiter*/,
                                           MojoWaitFlags /*flags*/,
                                           MojoResult /*wake_result*/) {
   NOTREACHED();
   return MOJO_RESULT_INTERNAL;
 }
 
 void MessagePipeEndpoint::RemoveWaiter(Waiter* /*waiter*/) {
   NOTREACHED();
 }
 
 void MessagePipeEndpoint::Attach(scoped_refptr<Channel> /*channel*/,
                                  MessageInTransit::EndpointId /*local_id*/) {
   NOTREACHED();
 }
 
-void MessagePipeEndpoint::Run(MessageInTransit::EndpointId /*remote_id*/) {
+bool MessagePipeEndpoint::Run(MessageInTransit::EndpointId /*remote_id*/) {
+  NOTREACHED();
+  return true;
+}
+
+void MessagePipeEndpoint::OnRemove() {
   NOTREACHED();
 }
 
 }  // namespace system
 }  // namespace mojo